diff --git a/shell.nix b/shell.nix
index 6e0ec5107..90eb4f2a4 100644
--- a/shell.nix
+++ b/shell.nix
@@ -114,17 +114,17 @@ let
            [[ -n "MINIO_LOGFILE" ]] && rm -rvf ''${MINIO_LOGFILE}
          }
 
-         minio_dir=$(mktemp -d)
+         export MINIO_DIR=$(mktemp -d)
          export MINIO_LOGFILE=$(mktemp --tmpdir minio.XXXXXX.log)
+         export MINIO_ACCESS_KEY=$(${pkgs.pwgen}/bin/pwgen -s 16 1)
+         export MINIO_SECRET_KEY=$(${pkgs.pwgen}/bin/pwgen -s 32 1)
 
-         minio server --address localhost:9000 ''${minio_dir} &>''${MINIO_LOGFILE} &
+         minio server --address localhost:9000 ''${MINIO_DIR} &>''${MINIO_LOGFILE} &
          minio_pid=$?
 
          sleep 1
 
-         export UPLOAD_S3_HOST=localhost UPLOAD_S3_PORT=9000 UPLOAD_S3_SSL=false
-         export UPLOAD_S3_KEY_ID=$(${pkgs.jq}/bin/jq -r '.credential.accessKey' ''${minio_dir}/.minio.sys/config/config.json)
-         export UPLOAD_S3_KEY=$(${pkgs.jq}/bin/jq -r '.credential.secretKey' ''${minio_dir}/.minio.sys/config/config.json)
+         export UPLOAD_S3_HOST=localhost UPLOAD_S3_PORT=9000 UPLOAD_S3_SSL=false UPLOAD_S3_KEY_ID=''${MINIO_ACCESS_KEY} UPLOAD_S3_KEY=''${MINIO_SECRET_KEY}
 
          set +xe
       fi